Get fully rid of operation initargs
ASDF never supported operation initargs, and its component-operation-times always assumed that two operations of the same class were equivalent. Make it explicitly so and enforce it. Do NOT pass keys from operate to make-instance operation. Catch any attempt to create an operation with initargs and raise an error. Make sure no operation class has any slot that isn't :allocation :class (with some MOP magic we could do it in at class definition time, but that's not portable enough and we don't want to reimplement closer-mop or depend on it.) This is a preliminary to allowing CONS instead of NODE-FOR to identify actions, whether or not we want to allow some form of initargs in the future. Remove unused COMPILE-OP-FLAGS and COMPILE-OP-PROCLAMATIONS. Remove MAKE-BUILD that depended on the unsupported operation initargs. Use PROGRAM-OP on a PROGRAM-SYSTEM instead. Remove the confusingly misnamed and not-so-useful BUILD-SYSTEM function; it can be done better in userland.